1
|
Exploring the Usability of α-MSH-SM-Liposome as an Imaging Agent to Study Biodegradable Bone Implants In Vivo. Int J Mol Sci 2023; 24:ijms24021103. [PMID: 36674616 PMCID: PMC9866773 DOI: 10.3390/ijms24021103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/23/2022] [Accepted: 01/05/2023] [Indexed: 01/09/2023] Open
Abstract
Novel biodegradable metal alloys are increasingly used as implant materials. The implantation can be accompanied by an inflammatory response to a foreign object. For studying inflammation in the implantation area, non-invasive imaging methods are needed. In vivo imaging for the implanted area and its surroundings will provide beneficiary information to understand implant-related inflammation and help to monitor it. Therefore, inflammation-sensitive fluorescent liposomes in rats were tested in the presence of an implant to evaluate their usability in studying inflammation. The sphingomyelin-containing liposomes carrying alpha-melanocyte-stimulating hormone (α-MSH)-peptide were tested in a rat bone implant model. The liposome interaction with implant material (Mg-10Gd) was analyzed with Mg-based implant material (Mg-10Gd) in vitro. The liposome uptake process was studied in the bone-marrow-derived macrophages in vitro. Finally, this liposomal tracer was tested in vivo. It was found that α-MSH coupled sphingomyelin-containing liposomes and the Mg-10Gd implant did not have any disturbing influence on each other. The clearance of liposomes was observed in the presence of an inert and biodegradable implant. The degradable Mg-10Gd was used as an alloy example; however, the presented imaging system offers a new possible use of α-MSH-SM-liposomes as tools for investigating implant responses.
Collapse
|
2
|
Hicks MD, Ovaitt AK, Fleming JC, Sorace AG, Song PN, Mansur A, Hartman YE, Rosenthal EL, Warram JM, Thomas CM. Hyperintensity of integrin-targeted fluorescence agent IntegriSense750 accurately predicts flap necrosis compared to Indocyanine green. Head Neck 2022; 44:134-142. [PMID: 34697855 PMCID: PMC8688316 DOI: 10.1002/hed.26914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 09/17/2021] [Accepted: 10/07/2021] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND Flap necrosis is a feared complication of reconstructive surgery. Current methods of prediction using Indocyanine green (ICG) lack specificity. IntegriSense750 is a fluorescence agent that binds sites of vascular remodeling. We hypothesized that IntegriSense750 better predicts flap compromise compared to ICG. METHODS Fifteen mice underwent lateral thoracic artery axial flap harvest. Mice received an injection of ICG (n = 7) or IntegriSense750 (n = 8) daily from postoperative days (POD) 0-3 and were imaged daily. Mean signal-to-background ratios quantified the change in fluorescence as necrosis progressed. RESULTS Mean signal-to-background ratio was significantly higher for IntegriSense750 compared to ICG on POD0 (1.47 ± 0.17 vs. 0.86 ± 0.21, p = 0.01) and daily through POD3 (2.12 ± 0.70 vs. 0.96 ± 0.29, p < 0.001). CONCLUSIONS IntegriSense750 demonstrates increased signal-to-background ratio at areas of flap distress compared to ICG which may increase identification of flap necrosis and improve patient outcomes.
Collapse
Affiliation(s)
- Melanie D Hicks
- Department of Otolaryngology – Head & Neck Surgery, University of Alabama at Birmingham, Birmingham, AL
| | - Alyssa K Ovaitt
- Department of Otolaryngology – Head & Neck Surgery, University of Alabama at Birmingham, Birmingham, AL
| | - Jason C Fleming
- Liverpool Head and Neck Centre, University of Liverpool & Aintree University Hospital, Liverpool, UK
| | - Anna G Sorace
- Department of Biomedical Engineering, University of Alabama at Birmingham, Birmingham, AL,Department of Radiology, University of Alabama at Birmingham, Birmingham, AL,O’Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL
| | - Patrick N Song
- Department of Radiology, University of Alabama at Birmingham, Birmingham, AL
| | - Ameer Mansur
- Department of Biomedical Engineering, University of Alabama at Birmingham, Birmingham, AL,Department of Radiology, University of Alabama at Birmingham, Birmingham, AL
| | - Yolanda E Hartman
- Department of Otolaryngology – Head & Neck Surgery, University of Alabama at Birmingham, Birmingham, AL
| | - Eben L Rosenthal
- Department of Otolaryngology – Head & Neck Surgery, Stanford University, Stanford, CA
| | - Jason M Warram
- Department of Otolaryngology – Head & Neck Surgery, University of Alabama at Birmingham, Birmingham, AL,O’Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL
| | - Carissa M Thomas
- Department of Otolaryngology – Head & Neck Surgery, University of Alabama at Birmingham, Birmingham, AL,O’Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL
| |
Collapse
|
3
|
Zadka Ł, Chabowski M, Grybowski D, Piotrowska A, Dzięgiel P. Interplay of stromal tumor-infiltrating lymphocytes, normal colonic mucosa, cancer-associated fibroblasts, clinicopathological data and the immunoregulatory molecules of patients diagnosed with colorectal cancer. Cancer Immunol Immunother 2021; 70:2681-2700. [PMID: 33625532 PMCID: PMC8360892 DOI: 10.1007/s00262-021-02863-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2019] [Accepted: 01/15/2021] [Indexed: 02/07/2023]
Abstract
A total of 94 patients with colorectal cancer (CRC) were included in this study. Lymphocytic infiltration of CD45+ cells in the normal colon was more pronounced than that in the paired tumor stroma (p = 0.0008). The mean immunoscore of CD45+TILs was decreased in CRC compared with the controls (p = 0.0010). The percentage of CD3+ cells was higher in stage II than in stage IV (p = 0.0218) and showed a negative correlation with the TNM classification (r = -0.2867, p = 0.0109). The number of stromal CD4+TILs was higher in stage I than in stage III (p = 0.0116) and IV (p = 0.0104), and there was a negative correlation between this number and the stage (r = -0.3708, p = 0.0008). There was a positive correlation between the Ki-67 and CD45+ (r = 0.2468, p = 0.0294), CD3+ (r = 0.3822, p = 0.0006), and CD4+ cells (r = 0.5465, p < 0.0001). The levels of cancer-associated fibroblast (CAF) markers such as α-SMA, thrombin and fibronectin were significantly higher in CRC than in normal colonic mucosa. The immunohistochemical expression of α-SMA was negatively correlated with TILs, while fibronectin showed positive coexpression. A higher number of cells expressing IL-2Rα, PD-L1, CD33 and CD14 were found in colorectal adenocarcinomas than in controls. The number of CD14+ cells was also dependent on the TNM stage (p = 0.0444) and tumor budding (p = 0.0324). These findings suggest a suppressive impact of CRC on the adaptive immune response and emphasize the importance of CAFs in regulating tumor immunity.
Collapse
Affiliation(s)
- Łukasz Zadka
- Department of Human Morphology and Embryology, Division of Histology and Embryology, Chałubińskiego 6a, 50-368, Wrocław, Poland.
| | - Mariusz Chabowski
- Department of Clinical Proceedings, Faculty of Health Science, Wroclaw Medical University, Wroclaw, Poland
- Department of Surgery, 4Th Military Teaching Hospital, Wroclaw, Poland
| | | | - Aleksandra Piotrowska
- Department of Human Morphology and Embryology, Division of Histology and Embryology, Chałubińskiego 6a, 50-368, Wrocław, Poland
| | - Piotr Dzięgiel
- Department of Human Morphology and Embryology, Division of Histology and Embryology, Chałubińskiego 6a, 50-368, Wrocław, Poland
| |
Collapse
|
4
|
Nanobodies as Versatile Tool for Multiscale Imaging Modalities. Biomolecules 2020; 10:biom10121695. [PMID: 33353213 PMCID: PMC7767244 DOI: 10.3390/biom10121695] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 12/11/2020] [Accepted: 12/14/2020] [Indexed: 02/07/2023] Open
Abstract
Molecular imaging is constantly growing in different areas of preclinical biomedical research. Several imaging methods have been developed and are continuously updated for both in vivo and in vitro applications, in order to increase the information about the structure, localization and function of molecules involved in physiology and disease. Along with these progresses, there is a continuous need for improving labeling strategies. In the last decades, the single domain antigen-binding fragments nanobodies (Nbs) emerged as important molecular imaging probes. Indeed, their small size (~15 kDa), high stability, affinity and modularity represent desirable features for imaging applications, providing higher tissue penetration, rapid targeting, increased spatial resolution and fast clearance. Accordingly, several Nb-based probes have been generated and applied to a variety of imaging modalities, ranging from in vivo and in vitro preclinical imaging to super-resolution microscopy. In this review, we will provide an overview of the state-of-the-art regarding the use of Nbs in several imaging modalities, underlining their extreme versatility and their enormous potential in targeting molecules and cells of interest in both preclinical and clinical studies.
Collapse
|